Use this (no, the regexp does not check for RFC-compatibility):

My_Url = function()

{}


	
My_Url.parse = function(url)

{
    this.url = url
    result = this.url.match(this.regexp)
    this.scheme = result1
    this.host = result2
    this.port = result3
    this.path = result4   
    return this

}

	
My_Url.prototype.parse = My_Url.parse

My_Url.prototype.regexp = /(https?:\/\/)([a-zA-Z0-9_\-\.]+)(:[0-9]+)?\/?(.*)?/

	
url = new My_Url()

url.parse(‘http://foobar.com/foo’)

alert(url.host)

This will open an alert window with the content »foobar.com«.